Premium
Immobilization of a Molecular Re Complex on MOF‐derived Hierarchical Porous Carbon for CO 2 Electroreduction in Water/Ionic Liquid Electrolyte
Author(s) -
Grammatico Domenico,
Tran Huan Ngoc,
Li Yun,
Pugliese Silvia,
Billon Laurent,
Su BaoLian,
Fontecave Marc
Publication year - 2020
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.202002014
Subject(s) - ionic liquid , catalysis , electrolyte , chemistry , carbon fibers , metal organic framework , glassy carbon , electrocatalyst , tetrafluoroborate , inorganic chemistry , chemical engineering , electrochemistry , supporting electrolyte , cyclic voltammetry , organic chemistry , materials science , electrode , adsorption , composite number , engineering , composite material
The development of molecular catalysts for CO 2 electroreduction within electrolyzers requests their immobilization on the electrodes. While a variety of methods have been explored for the heterogenization of homogeneous complexes, a novel approach using a hierarchical porous carbon material, derived from a metal–organic framework, is reported as a support for the well‐known molecular catalyst [Re(bpy)(CO) 3 Cl] (bpy=2,2’‐bipyridine). This cathodic hybrid material, named Re@HPC (HPC=hierarchical porous carbon), has been tested for CO 2 electroreduction using a mixture of an ionic liquid (1‐ethyl‐3‐methylimidazolium tetrafluoroborate, EMIM) and water as the electrolyte. Interestingly, it catalyzes the conversion of CO 2 into a mixture of carbon monoxide and formic acid, with a selectivity that depends on the applied potential. The present study thus reveals that Re@HPC is a remarkable catalyst, enjoying excellent activity (turnover numbers for CO 2 reduction of 7835 after 2 h at −1.95 V vs. Fc/Fc + with a current density of 6 mA cm −2 ) and good stability. These results emphasize the advantages of integrating molecular catalysts onto such porous carbon materials for developing novel, stable and efficient, catalysts for CO 2 reduction.